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2) In a survey of 2223 adults, 1167 think antibiotics are effective against viral infections. Construct...

2) In a survey of 2223 adults, 1167 think antibiotics are effective against viral infections. Construct a 99% confidence interval for the true population proportion. Round your final answers to the nearest thousandths (3 numbers after the decimal).

Math   Statistics-And-Probability   
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Answer #1

We have given here,              
              
x=1167          
n=2223          
Estimate for sample proportion=   0.525  
Level of significance is =1-0.99=0.01      
Z critical value(using Z table)=2.576      
              


Lower limit for confidence interval=0.498  
              
Upper limit for confidence interval=0.552

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